Lock



Patented Apr. 5, 1949 UNITED STATES PATENT ()FFICE LOCK Morris Sachs,New York, N. Y.

Application Marchr5, 1946, Serial No. 651,993

This invention relates to locks, and particularly to door locks, and oneof the objects of the invention is to provide a lock of this characterhaving means by which its accurate fitment to doors will be greatlyfacilitated.

Locks of the kind usually employed upon doors, are provided with acylindrical portion fitting in a hole cut through the door. On theinside face of the door is secured a casing in whichthe. sliding boltand associated lock-parts are housed. A stem or bar extends from thecylindrical part of the lock to a bolt-actuating memberthat is containedin the casing. Inattaching the casing to the back of the door it isessential that the casing be accurately positioned so that the stem orbar will readily insert itself in a slot provided in the bolt-actuatingmember. Careless or unskilled workers, when attaching a, lock of thiskind to a door, often find that after the job is completed, the lock iseither inoperative or else Works very stifily, this being usually due tothe inaccurate alignment of the casing with respect to the stem or barthat projects from the cylinder.

The primary object therefore, of the present invention, is to provide ina lock of this character, means by which the casing is always accuratelyfitted to the door with respect to the cylinder and the stem or barprojecting therefrom. The result is that with a lock of this kind, evenan unskilled Worker cannot fail to properly assemble the parts so thatsmooth and easy operation of the lock is bound to occur.

More particularly, the invention contemplates the provision of a lockcylinder having a plate for holding it in place, said plate beinglocated on the inside of the door and being provided with one or morelaterally-extending projections or aligning lugs which fit into suitablenotches or recesses provided for their reception in a portion of thecasing. Due to this arrangement, the casing, when fitted over theabove-mentioned plate, will receive the projections or lugs in itsrecesses, and will thus be guided into the proper position forattachment to the face of the door, and this will cause the stem or barprotruding from the cylinder to accurately enter the boltactuatorcontained within the casing.

In the accompanying drawing, wherein an illustrative embodiment of theinvention is shown, Fig. l is a view of the inside face of a part of adoor, showing the plate attached thereto; Fig. 2 is a view of the rearface or back of the lock casing, showing the notched or recessed backmember thereof for the reception of the lugs 1 Claim. (Cl. 70-451)provided on the cylinder back plate; Fig. 3'is a sectional view througha part of the doorand the cylinder plate, as well as through the lockcasing, showing how-the lugs on the'cylinder plate enter the recessesor-notches in the back plate of the casing; Fig. 4 is a sectional viewtaken at right angles to that of Fig. 3, andFig. 5 is a perspective viewof the plate and a part of the back member of the'lock casing, showinghow the lugs on the plate enter the recesses or notches provided intheback member.

In the drawing, 8 indicates a portion ofa-door to-which the lock isattached. A lock of this character is usually provided with a cylinder 2of conventional construction, containing the usual tumbler mechanism andprovided with the stem or bar 3 projectin from its rear end, said stemor bar being received in a slot 5 in a rotative bolt-actuator 6contained within the bolt casing I and rotative in the rear plate 8 ofsaid casing. The casing 1 contains the conventional sliding bolt andother lock parts which have been herein omitted for simplicity inillustration since the same form no part of the present invention. Therear plate or back member 8 of the casing I is held in place in thecasing by a screw I6 entering a post I! forming a part of the casing I.

The cylinder 2 is held in the hole 9 extending through the door, bymeans of a back plate H], herein referred to as the cylinder plate inorder to distinguish it from the back plate 8 of the casing I. Saidplate I0 is secured to the cylinder by the screws ll, this beingconventional construction. In the present embodiment of the invention,said cylinder plate I0 is provided with a substantially central apertureI2 through which the stem or bar 3 protrudes to enable the same to reachand enter the slot 5 in the bolt-actuator 6, when the casing is attachedto the back of the door in proper position over the cylinder plate l0.

Extending laterally from the opposite edges of the cylinder plate Illare lugs l3 which are adapted to fit into recesses or notches l4provided in the opposite edges of the back plate 8 of the casing. Thesetwo lugs l3 are so located with respect to the recesses N that when thecasing I is placed over the cylinder plate Ill and in the properposition to enable the stem or bar 3 to enter the slot 5 in thebolt-actuator 6, the lugs l3 will enter the recesses or notches l4 andwill thus accurately position the casing at the proper place on the backof the door and hold it in that position until screws are insertedthrough the 3 holes I provided in the casing, to attach the casingpermanently to the back of the door.

Since the fitment of the lugs l3 into the recesses [4 will accuratelyposition the casing with respect to the plate l0, it will be clear thatthe correct location of the casing on the back face of the door ismerely a matter of placing it in a position where the lugs I3 will enterthe recesses II, and when this has been done it will be found that thestem or bar 3 has entered the slot 5 in the actuator 6. It is then onlynecessary to attach the casing to the back of the door by the usualscrews extended through the openings [5, and the job is complete. Itwill be found that through this accurate setting of the casing withrespect to the cylinder, no strain, bending or distortion is imposed onthe stem or bar 3 with the result that the lock will operate smoothlyand efliciently.

While I have shown and described one embodiment of the invention, it isobviously that various modifications may be made without departing fromthe spirit of the invention. For example, while the cylinder plate I0 isshown as being provided with two lugs l3, it will be clear that one ormore of these lugs might be used. Moreover, while the lugs l3 are shownas being composed of parts which are bent laterally from the side edgesof the plate M, such lugs might also be formed by being struck out fromthe body of the plate, or by separate elements attached to the plate.Other changes will be readily apparent to those skilled in the art, suchchanges being and the casing part having a back plate spaced inwardlyfrom the back of the casing and closing the rear of the casing andformed with a plurality of recesses extending inwardly from its upperand lower edges to receive said lugs to thereby guide the casing partinto a proper position for fastening on the door to enable the casingpart to co-operate with the cylinder part.

MORRIS SACHS.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 806,003 Roche Nov. 28, 1905956,005 Voight Apr. 26, 1910 1,642,047 Segal Sept. 13, 1927 1,843,143Rymer Feb. 2, 1932 1,947,443 Bargman Feb. 20, 1934

